20 Most Recent 2005 kawasaki KX 125 Questions & Answers

go bac and chec timing-mite hav confused top dead center with bottom--also is wiring tite and no flaws specialy at batt area,coil .....mite need to take some current test

The caps on motorcycle plug wire that snap onto the spark plug wear out and yours may need be replaced. They just unscrew from the wire and new ones screw onto the old wire. May not hurt to see if your plug wires can be changed from the coil as well. Get some new solid core wire and the resistor caps.

32:1 is what is considered stock for most 2 stroke kawasaki

Well - not knowing the condition of the bike it could be a lot of things. I would start with a fresh spark plug, fresh fuel and a clean air filter. You say you already did the carb, reeds and top end - good. I assume you set the float level correctly. Did you pull out the petc0ck from the fuel tank - theres a filter that might be plugged up. Check your exhaust system for plugs - I've seen mice nest in pipes over the winter. If all this fails, look into your power valve system to ensure it's working and adjusted properly. If so, then do a leak down test - you might have a lower end leak. That's the best I can do without seeing or hearing it run. Hope this helped!

The same wat you took it off. No adjustment should be needed unless you have tampered with it previously

your probably runnin to rich i would run 36:1 to 40:1

change the plug then drain the carb and ck compression and that will tell u the story

shifter drum

if your talking about fuel mix oil the best is either amsoil or red line fully synthetic oil is the best out there(not cheep though)...if your talking about engine oil (wet clutch)i think bel-ray is the best..(thats what i have had best luck and less breakdowns with)

WOW, I haven't ran into this for decades. Well, I would bet, the circlip that keeps the shift shaft into place is missing, the bike fall hard on the left side sometime? Well, if the clip is missing, the shaft can move to the right and there is a lever with a hooked arm that rides upon a shift drum (all trail bikes have similar system) and moving the shift lever, moves the hooked arm over the drum, causing a shift in gears. If the shaft is loose, the hooked arm will eventually come off the drum. Not sure, but it's probably under the r/s cover. This is a repair I did a lot in jr.high school for my friends. Not too hard.

http://www.bikebandit.com/houseofmotorcycles/2005-kawasaki-motorcycle-kx125-kx125-m3/o/m3786

differnt brands of oil, suggest different ratios. The oil packaging will give recommended mixes
starting at 25-1 for the cheaper mineral oils, to 50-1 for the more expensive synthetics.

anything over 120 on compression test is ok. anything under 120 and its time for top end. and for bog you might try cleaning carb.

around 130-160 and anything below 120 time for top end.( at least ring)

sounds like it seized! if the kick starter wont go down. take the spark plug out, pour some thin oil down the hole, let it soak overnight, then try moving the kick starter again.

Check for spark, compression, replace plug.

In colder weather, you might want to try running a hotter plug. Your bike likely came with a BR9EG or variation of that plug. Try running a B8ES - available at AutoZone or Advance for $2.

Clean your air filter, too.

Is this bike new to you? Do you know any of it's history - like when the last time it had a new top end? If it starts easily, you likely have decent compression. But if you just got it, it could need to have the jetting adjusted to suit your area.

If its running for about an hour before trouble,there is not a lot wrong.Have a real good look to see it has the correct spark plug.This doesn't mean the original type but by looking at the plug and its colors it may be the wrong heat range.This is often the case with different styles of riding and any mods done to the bike.Next ride,take another plug with you.When the bike stops,put the other plug straight in and see if that gets you going.This would be the 1st place to start looking for the fix to your problem.Hope this helps

You will have to remove the head and cyclinder to do this. You will need a manual on top end rebuilds for you bike.